Aer Lingus' cancellation policy varies by fare type and flight route:+1-888-415-1245 Transatlantic flights to/from the USA may be fully refunded if cancelled within 24 hours of booking and at least 7 days before departure. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) For other flights, non-refundable Saver and Plus fares only allow for a refund of taxes and charges, while flexible fare types like Advantage, Smart, and Flex can be refunded via voucher or cash up to two hours before departure. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK).